Finding the Fourth Proportional to 163.57, 246.11 and 129.70
Calculator
Solution
The fourth proportional to 163.57, 246.11 and 129.70 is: 195.15
Step by Step Solution
- Step 1: Write the proportion equation
163.57 : 246.11 = 129.70 : x - Step 2: Convert to fraction form
163.57/246.11 = 129.70/x - Step 3: Cross multiply
163.57x = 246.11 × 129.70 - Step 4: Simplify right side
163.57x = 31,921.22 - Step 5: Solve for x
x = 31,921.22/163.57 - Step 6: Final answer
x = 195.15
Related Problems
Find fourth proportional to 81.78, 123.06 and 64.85
Half scale
Find fourth proportional to 327.14, 492.23 and 259.40
Double scale
Find fourth proportional to 164.57, 247.62 and 130.70
Similar ratio
Find fourth proportional to 245.35, 369.17 and 194.55
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.